"The more we go out and the less we eat at home, the more likely we are to take in enormous amounts of calories, of sodium, of sugar and of carbohydrates," said Kristin Kirkpatrick, a registered dietician and the Cleveland Clinic.

Kirkpatrick said one study found eating just one fast food meal per week can increase your risk of dying from heart disease by 20 percent.

Another study found women who pack their lunch lost about 5 more pounds than women who consistently ate lunch at a restaurant.

Another habit that packs on the pounds is loving the couch or chair too much.

This is especially true for those who have a desk job.

Kirkpatrick suggested setting email or text reminders to get up and walk at different times during the day.

Another bad habit people get into is not eating enough. It slows your metabolism.

"When your metabolism is down and you’re not giving yourself enough fuel your body really holds on to every calorie that you have, so you need to ramp up that metabolism. That means getting enough calories in your diet," said Kirkpatrick.

Kirkpatrick said another habit to avoid is eating when you’re stressed. She said stress-eating can lead to bad food choices and overeating.